/* Layout concept: fixed top app-bar; content switches between marketing home (hero + product grid)
   and a docs shell (left nav tree · article · right rail / code panel). Blue fintech identity. */
:root{
  --bg:#eef2f8; --surface:#ffffff; --surface-2:#f4f7fc; --surface-3:#e8eef7;
  --fg:#0d1a2d; --fg-soft:#33435c; --muted:#64748b; --faint:#8a99b0;
  --border:#dbe3ef; --border-strong:#c6d2e3;
  --primary:#1a56d6; --primary-600:#1347b8; --primary-700:#0f3a97; --primary-050:#e8f0ff;
  --accent:#0ea5b7;
  --m-get:#0a7d4b; --m-get-bg:#e4f6ec;
  --m-post:#1a56d6; --m-post-bg:#e8f0ff;
  --m-put:#b26a00; --m-put-bg:#fcf0dc;
  --m-del:#c02828; --m-del-bg:#fdeaea;
  --code-bg:#0c1627; --code-fg:#d7e0f0; --code-line:#1c2a43;
  --ring:rgba(26,86,214,.35);
  --shadow-sm:0 1px 2px rgba(13,26,45,.06),0 1px 3px rgba(13,26,45,.04);
  --shadow-md:0 6px 18px rgba(13,26,45,.08),0 2px 6px rgba(13,26,45,.05);
  --shadow-lg:0 24px 60px rgba(13,26,45,.16);
  --h:60px;
  --font-head:"Be Vietnam Pro",system-ui,"Segoe UI",sans-serif;
  --font-body:"Inter","Be Vietnam Pro",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#070d19; --surface:#0e1726; --surface-2:#111c30; --surface-3:#172339;
  --fg:#eaf1fb; --fg-soft:#c3d0e4; --muted:#92a1bb; --faint:#6b7c99;
  --border:#1e2c45; --border-strong:#2a3b59;
  --primary:#4f8bff; --primary-600:#6a9dff; --primary-700:#8bb4ff; --primary-050:#15233c;
  --accent:#2bc3d4;
  --m-get:#4ad08a; --m-get-bg:#0e2a1d;
  --m-post:#6a9dff; --m-post-bg:#132544;
  --m-put:#e3a94a; --m-put-bg:#2c2110;
  --m-del:#f0696e; --m-del-bg:#2c1416;
  --code-bg:#060c17; --code-fg:#cdd8ec; --code-line:#152137;
  --ring:rgba(79,139,255,.4);
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 6px 20px rgba(0,0,0,.45);
  --shadow-lg:0 24px 60px rgba(0,0,0,.6);
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --bg:#070d19; --surface:#0e1726; --surface-2:#111c30; --surface-3:#172339;
  --fg:#eaf1fb; --fg-soft:#c3d0e4; --muted:#92a1bb; --faint:#6b7c99;
  --border:#1e2c45; --border-strong:#2a3b59;
  --primary:#4f8bff; --primary-600:#6a9dff; --primary-700:#8bb4ff; --primary-050:#15233c;
  --accent:#2bc3d4;
  --m-get:#4ad08a; --m-get-bg:#0e2a1d;
  --m-post:#6a9dff; --m-post-bg:#132544;
  --m-put:#e3a94a; --m-put-bg:#2c2110;
  --m-del:#f0696e; --m-del-bg:#2c1416;
  --code-bg:#060c17; --code-fg:#cdd8ec; --code-line:#152137;
  --ring:rgba(79,139,255,.4);
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 6px 20px rgba(0,0,0,.45);
  --shadow-lg:0 24px 60px rgba(0,0,0,.6);
  color-scheme:dark;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-body);
  font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.2;text-wrap:balance;margin:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
code,kbd,pre{font-family:var(--font-mono)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--font-mono)}

/* ---------- App bar ---------- */
.appbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:60;background:color-mix(in srgb,var(--surface) 86%,transparent);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--h);display:flex;align-items:center}
.appbar-inner{width:100%;max-width:1320px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:18px;min-width:0}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:800;font-size:16px;letter-spacing:-.2px;white-space:nowrap;min-width:0}
.brand>span:last-child{min-width:0;overflow:hidden;text-overflow:ellipsis}
.brand .logo{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:var(--shadow-sm)}
.brand small{display:block;font-family:var(--font-body);font-weight:500;font-size:10.5px;color:var(--muted);letter-spacing:.3px;margin-top:-2px}
.nav{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav a{padding:7px 12px;border-radius:8px;font-size:14px;font-weight:500;color:var(--fg-soft)}
.nav a:hover{background:var(--surface-3);color:var(--fg)}
.nav a.active{color:var(--primary);font-weight:600}
.appbar-right{margin-left:auto;display:flex;align-items:center;gap:8px}
.search{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);
  border-radius:9px;padding:7px 11px;color:var(--muted);min-width:210px;font-size:13px}
.search kbd{margin-left:auto;background:var(--surface);border:1px solid var(--border);border-radius:5px;
  padding:1px 6px;font-size:11px;color:var(--faint)}
button.search{font-family:inherit;cursor:pointer;text-align:left}
button.search:hover{border-color:var(--border-strong);color:var(--fg-soft)}
.iconbtn.show-sm{display:none}
/* ---------- tìm kiếm toàn site (⌘K) ---------- */
.tk-backdrop{align-items:flex-start;padding-top:min(12vh,110px)}
.tk-box{max-width:620px;display:flex;flex-direction:column;overflow:hidden}
.tk-head{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--border);color:var(--muted)}
.tk-head input{flex:1;min-width:0;border:0;background:none;outline:none;font:inherit;font-size:16px;color:var(--fg)}
.tk-head input::placeholder{color:var(--faint)}
.tk-head input::-webkit-search-cancel-button{display:none}
.tk-esc{border:1px solid var(--border);background:var(--surface-2);color:var(--faint);border-radius:6px;font-size:11px;padding:2px 7px;font-family:inherit}
.tk-list{max-height:min(60vh,520px);overflow:auto;padding:6px}
.tk-grp{font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--faint);padding:10px 10px 4px}
.tk-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:9px;color:var(--fg-soft);min-width:0}
.tk-item .tk-t{font-weight:600;color:var(--fg);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tk-item .tk-d{font-size:12.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tk-item .tk-txt{min-width:0;flex:1}
.tk-item .tk-ic{width:28px;height:28px;border-radius:7px;display:grid;place-items:center;flex:0 0 auto;background:var(--surface-3);color:var(--muted)}
.tk-item .method{font-size:9.5px;min-width:46px}
.tk-item.sel,.tk-item:hover{background:var(--primary-050)}
.tk-item.sel .tk-t{color:var(--primary)}
.tk-empty{padding:26px 12px;text-align:center;color:var(--faint);font-size:13.5px}
.tk-foot{display:flex;gap:16px;padding:9px 16px;border-top:1px solid var(--border);font-size:11.5px;color:var(--faint)}
.tk-foot kbd{border:1px solid var(--border);background:var(--surface-2);border-radius:4px;padding:0 5px;font-size:10.5px;margin-right:3px}
/* ---------- trang chi tiết sản phẩm ---------- */
.wrap.prod-page{padding-block:34px 70px;max-width:1100px}
.prod-head{display:flex;align-items:flex-start;gap:18px;margin-top:6px}
.prod-head .picon{width:64px;height:64px;border-radius:16px;display:grid;place-items:center;flex:0 0 auto;color:#fff;
  font-family:var(--font-head);font-weight:800;font-size:18px;overflow:hidden;box-shadow:var(--shadow-sm)}
.prod-head .picon img{width:44px;height:44px;object-fit:contain}
.prod-head h1{font-size:34px;letter-spacing:-.6px}
.prod-head .lede{margin:10px 0 0}
.prod-head .ptags{margin-top:12px}
.prod-cta{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 8px}
.prod-sec{margin-top:34px}
.prod-sec h2{font-size:22px;letter-spacing:-.3px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.prod-desc{color:var(--fg-soft);white-space:pre-line;margin:12px 0;max-width:75ch}
a.qc{display:block}
.iconbtn{width:36px;height:36px;border-radius:9px;border:1px solid var(--border);background:var(--surface-2);
  color:var(--fg-soft);display:grid;place-items:center}
.iconbtn:hover{background:var(--surface-3);color:var(--fg)}
.lang{border:1px solid var(--border);background:var(--surface-2);border-radius:9px;padding:0 11px;height:36px;
  font-weight:600;font-size:13px;color:var(--fg-soft);display:flex;align-items:center;gap:6px}
.btn{border:1px solid transparent;border-radius:9px;padding:9px 15px;font-weight:600;font-size:13.5px;display:inline-flex;
  align-items:center;gap:8px;white-space:nowrap;transition:transform .05s ease,box-shadow .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--primary-600)}
.btn-ghost{background:var(--surface-2);border-color:var(--border);color:var(--fg)}
.btn-ghost:hover{background:var(--surface-3)}
.btn-lg{padding:12px 20px;font-size:15px;border-radius:11px}
.menu-toggle{display:none}
.hide-mobile{}
svg{display:block}
.i{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- Generic ---------- */
.wrap{max-width:1320px;margin:0 auto;padding:0 20px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:var(--primary)}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
  background:var(--primary-050);color:var(--primary);border:1px solid color-mix(in srgb,var(--primary) 22%,transparent)}

/* ---------- Home: hero ---------- */
.hero{position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(900px 440px at 78% -8%,color-mix(in srgb,var(--primary) 22%,transparent),transparent 60%),
    radial-gradient(700px 360px at 8% 8%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 55%);}
.hero::after{content:"";position:absolute;inset:0;z-index:0;opacity:.5;
  background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);
  background-size:38px 38px;-webkit-mask-image:radial-gradient(70% 80% at 50% 0%,#000,transparent 75%);
  mask-image:radial-gradient(70% 80% at 50% 0%,#000,transparent 75%)}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding-block:68px 76px}
.hero h1{font-size:46px;font-weight:800;letter-spacing:-1px}
.hero h1 .grad{background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--fg-soft);margin:20px 0 0;max-width:40ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-trust{margin-top:28px;display:flex;flex-wrap:wrap;gap:22px;color:var(--muted);font-size:13px}
.hero-trust span{display:inline-flex;align-items:center;gap:7px}
.hero-trust .i{width:16px;height:16px;color:var(--accent)}

/* code card */
.codecard{background:var(--code-bg);border:1px solid var(--code-line);border-radius:16px;box-shadow:var(--shadow-lg);
  overflow:hidden;min-width:0}
.codecard .cc-top{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--code-line)}
.dot{width:11px;height:11px;border-radius:50%}
.cc-tabs{margin-left:10px;display:flex;gap:4px}
.cc-tabs button{background:transparent;border:0;color:#8ea2c4;font-family:var(--font-mono);font-size:12px;padding:4px 9px;border-radius:6px}
.cc-tabs button.active{background:var(--code-line);color:#fff}
.cc-copy{white-space:nowrap;flex:0 0 auto;margin-left:auto;color:#8ea2c4;background:transparent;border:1px solid var(--code-line);border-radius:7px;
  padding:4px 9px;font-size:11.5px;display:inline-flex;align-items:center;gap:5px}
.cc-copy:hover{color:#fff}
pre.code{margin:0;padding:18px 18px;overflow:auto;font-size:12.6px;line-height:1.75;color:var(--code-fg);background:var(--code-bg)}
.cc-label{color:#8ea2c4;font-family:var(--font-mono);font-size:12px}
pre.code .tok-k{color:#79b8ff}.tok-s{color:#9ae6a0}.tok-p{color:#c9a7ff}.tok-c{color:#6b7c99;font-style:italic}.tok-n{color:#f0b37b}.tok-m{color:#7fd1e0}

/* ---------- sections ---------- */
section.block{padding-block:62px}
.sec-head{max-width:620px;margin-bottom:34px}
.sec-head h2{font-size:30px;letter-spacing:-.5px;margin-top:10px}
.sec-head p{color:var(--muted);font-size:16px;margin:12px 0 0}

/* product grid */
.pgrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.pcard.featured{border-color:color-mix(in srgb,var(--primary) 45%,var(--border));box-shadow:var(--shadow-md);position:relative}
.pcard.featured::before{content:"Lớp kết nối";position:absolute;top:14px;right:14px;font-size:10.5px;font-weight:700;letter-spacing:.4px;
  color:var(--primary);background:var(--primary-050);border:1px solid color-mix(in srgb,var(--primary) 25%,transparent);border-radius:999px;padding:3px 8px}
.pcard{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:22px;display:flex;flex-direction:column;
  gap:12px;min-width:0;transition:border-color .15s,box-shadow .15s,transform .15s}
.pcard:hover{border-color:var(--border-strong);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.pcard .picon{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;color:#fff;flex:0 0 auto}
.pcard h3{font-size:17px}
.pcard p{color:var(--muted);font-size:14px;margin:0;flex:1}
.ptags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:11.5px;font-weight:600;color:var(--fg-soft);background:var(--surface-3);border-radius:6px;padding:3px 8px}
.pcard .plink{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:13.5px;color:var(--primary);margin-top:2px}
.pcard:hover .plink .i{transform:translateX(3px)}
.pcard .plink .i{width:15px;height:15px;transition:transform .15s}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;position:relative}
.step .num{counter-increment:s;font-family:var(--font-head);font-weight:800;font-size:13px;color:var(--primary);
  width:30px;height:30px;border-radius:8px;background:var(--primary-050);display:grid;place-items:center;margin-bottom:14px}
.step .num::before{content:"0" counter(s)}
.step h3{font-size:16px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14px;margin:0}
.step pre{margin:12px 0 0;background:var(--code-bg);color:var(--code-fg);border-radius:9px;padding:11px 13px;font-size:12px;overflow:auto}

/* features */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat{padding:22px;border:1px solid var(--border);border-radius:14px;background:var(--surface-2)}
.feat .fi{width:40px;height:40px;border-radius:10px;background:var(--surface);border:1px solid var(--border);display:grid;place-items:center;color:var(--primary);margin-bottom:14px}
.feat h3{font-size:15.5px;margin-bottom:6px}
.feat p{color:var(--muted);font-size:13.5px;margin:0}

/* cta band */
.ctaband{background:linear-gradient(120deg,var(--primary-700),var(--primary));border-radius:20px;padding:46px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;box-shadow:var(--shadow-lg);overflow:hidden;position:relative}
.ctaband::after{content:"";position:absolute;right:-60px;top:-60px;width:320px;height:320px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%)}
.ctaband>*{position:relative;z-index:1}
.ctaband h2{font-size:26px;color:#fff;position:relative}
.ctaband p{opacity:.9;margin:8px 0 0;max-width:46ch;position:relative}
.ctaband .btn-white{background:#fff;color:var(--primary-700);position:relative}

/* footer */
footer.foot{border-top:1px solid var(--border);background:var(--surface);margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding-block:48px 30px}
.foot h4{font-size:13px;text-transform:uppercase;letter-spacing:.8px;color:var(--faint);margin-bottom:14px;font-family:var(--font-body);font-weight:700}
.foot a{display:block;color:var(--muted);font-size:14px;padding:5px 0}
.foot a:hover{color:var(--primary)}
.foot-bottom{border-top:1px solid var(--border);padding-block:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:13px}

/* ---------- Docs shell (overview + api) ---------- */
.docs{max-width:1320px;margin:0 auto;display:grid;grid-template-columns:272px minmax(0,1fr);align-items:start}
.docs.api{grid-template-columns:272px minmax(0,1fr) 420px}
.sidenav{position:sticky;top:calc(var(--h) + env(safe-area-inset-top,0px));height:calc(100vh - var(--h));overflow:auto;
  border-right:1px solid var(--border);padding:24px 14px 60px}
.sn-prod{display:flex;align-items:center;gap:10px;padding:10px;border:1px solid var(--border);border-radius:11px;background:var(--surface-2);margin-bottom:16px}
.sn-prod .picon{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex:0 0 auto;overflow:hidden;
  color:#fff;font-family:var(--font-head);font-weight:800;font-size:11.5px}
.sn-prod .picon img{width:24px;height:24px;object-fit:contain}
.sn-prod b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
/* menu chính trong drawer mobile (YUIWEB-43) – chỉ hiện ≤860px */
.sn-mainnav{display:none}
.sn-mainnav a{padding:9px 10px;border-radius:8px;font-weight:600;font-size:14px;color:var(--fg-soft)}
.sn-mainnav a:hover{background:var(--surface-3);color:var(--fg)}
.sn-mainnav a.active{color:var(--primary);background:var(--primary-050)}
.sn-mainnav .btn{width:100%;justify-content:center;margin-top:8px}
.sidenav-main{display:none}
.sn-prod b{font-size:13.5px}.sn-prod span{font-size:11.5px;color:var(--muted)}
.sn-prodsel{margin-top:4px;width:100%;border:1px solid var(--border);background:var(--surface);color:var(--fg-soft);
  border-radius:7px;padding:4px 8px;font-size:12px;font-family:inherit;cursor:pointer;min-width:0}
.sn-prodsel:focus{outline:none;border-color:var(--primary)}
.sn-group{font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--faint);margin:16px 10px 6px}
.sn-link{display:flex;align-items:center;gap:9px;padding:7px 10px;border-radius:8px;color:var(--fg-soft);font-size:13.5px;font-weight:500}
.sn-link:hover{background:var(--surface-3);color:var(--fg)}
.sn-link.active{background:var(--primary-050);color:var(--primary);font-weight:600}
/* phòng hờ: link trực tiếp trong sidenav quên class vẫn là item dọc (YUIWEB-38) */
.sidenav>a:not(.sn-link){display:block;padding:7px 10px;border-radius:8px;color:var(--fg-soft);font-size:13.5px}
.sidenav>a:not(.sn-link):hover{background:var(--surface-3);color:var(--fg)}
.sidenav>a.active{background:var(--primary-050);color:var(--primary);font-weight:600}
.method{font-family:var(--font-mono);font-weight:700;font-size:10px;padding:2px 6px;border-radius:5px;letter-spacing:.3px;flex:0 0 auto;min-width:42px;text-align:center}
.m-GET{color:var(--m-get);background:var(--m-get-bg)}
.m-POST{color:var(--m-post);background:var(--m-post-bg)}
.m-PUT{color:var(--m-put);background:var(--m-put-bg)}
.m-DELETE{color:var(--m-del);background:var(--m-del-bg)}
.m-PATCH{color:var(--m-put);background:var(--m-put-bg)}
.m-HEAD,.m-OPTIONS{color:var(--muted);background:var(--surface-3)}
.sn-link .mono{font-size:12.5px}
.sn-link{min-width:0}
.sn-ep-name{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}

/* article */
.article{padding:34px 40px 80px;min-width:0}
.crumb{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;margin-bottom:16px}
.crumb a:hover{color:var(--primary)}
.article h1{font-size:34px;letter-spacing:-.6px}
.article h2{font-size:22px;margin:40px 0 14px;letter-spacing:-.3px;scroll-margin-top:calc(var(--h) + env(safe-area-inset-top,0px) + 20px)}
.article h3{font-size:16.5px;margin:26px 0 10px}
.article p{color:var(--fg-soft);margin:14px 0}
.article ul{color:var(--fg-soft);padding-left:22px;margin:14px 0}
.article li{margin:7px 0}
.lede{font-size:17px;color:var(--muted)}
.callout{border:1px solid var(--border);border-left:3px solid var(--primary);background:var(--surface-2);border-radius:10px;
  padding:15px 18px;margin:20px 0;display:flex;gap:12px}
.callout .i{color:var(--primary);flex:0 0 auto;margin-top:2px}
.callout b{color:var(--fg)}
.callout.warn{border-left-color:var(--m-put)}.callout.warn .i{color:var(--m-put)}
.qgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0}
.qc{border:1px solid var(--border);border-radius:12px;padding:18px;background:var(--surface);transition:border-color .15s,box-shadow .15s}
.qc:hover{border-color:var(--border-strong);box-shadow:var(--shadow-sm)}
.qc h3{margin:0 0 4px;font-size:15px}.qc p{margin:0;font-size:13.5px;color:var(--muted)}
.dtable{width:100%;border-collapse:collapse;margin:16px 0;font-size:13.5px;border:1px solid var(--border-strong);border-radius:8px}
.dtable th{text-align:center;font-size:12.5px;color:var(--fg);background:var(--surface-2);
  padding:10px 12px;border:1px solid var(--border-strong);font-weight:700;white-space:nowrap}
.dtable td{padding:10px 12px;border:1px solid var(--border-strong);vertical-align:top;color:var(--fg-soft)}
.dtable td.center{text-align:center}
.dtable td .mono{color:var(--primary);font-size:12.5px}
.dtable td.ex .mono{color:var(--muted)}
.yn{display:inline-block;font-size:11px;font-weight:700;padding:2px 11px;border-radius:5px;min-width:38px;text-align:center}
.yn-yes{background:var(--m-del-bg);color:var(--m-del)}
.yn-no{background:var(--surface-3);color:var(--muted)}
.sn-search{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);
  border-radius:9px;padding:8px 11px;margin-bottom:12px;color:var(--muted)}
.sn-search input{border:0;background:none;outline:none;color:var(--fg);font-size:13px;width:100%;font-family:inherit;min-width:0}
.sn-search input::placeholder{color:var(--faint)}
.sn-empty{font-size:12.5px;color:var(--faint);padding:10px;text-align:center}
/* YUIWEB-54: thuộc tính hidden phải thắng display:flex/block của .sn-link/.sn-group (ô Tìm endpoint) */
.sn-link[hidden],.sn-group[hidden],.sn-empty[hidden]{display:none!important}
.tablewrap{overflow-x:auto}
.endpoint-url{display:flex;align-items:center;gap:12px;background:var(--surface-2);border:1px solid var(--border);
  border-radius:11px;padding:12px 14px;margin:18px 0;flex-wrap:wrap}
.endpoint-url .mono{font-size:14px;color:var(--fg);word-break:break-all}
/* khối endpoint trong API Reference */
.ep-card{border:1px solid var(--border);border-radius:14px;padding:18px;margin:16px 0;background:var(--surface);
  scroll-margin-top:calc(var(--h) + env(safe-area-inset-top,0px) + 20px)}
/* Không để nội dung endpoint làm tràn ngang trang (YUIWEB-38): bảng/code cuộn trong khung riêng */
.ep-card{min-width:0}
.ep-card>p{overflow-wrap:anywhere}
.ep-title{display:flex;align-items:flex-start;gap:12px}
.ep-title h1{font-size:28px;min-width:0;flex:1;overflow-wrap:anywhere}
.ep-title .method{font-size:12px;min-width:54px;padding:4px 9px;margin-top:6px}
.endpoint-url .mono{min-width:0;overflow-wrap:anywhere}
/* Không JS: liệt kê mọi endpoint dạng thẻ theo nhóm. Có JS (open-api.js gắn .api-js): mỗi màn 1 endpoint như mockup,
   ví dụ code chuyển sang code panel cột phải. */
html:not(.api-js) .ep-card .crumb{display:none}
html:not(.api-js) .ep-title h1{font-size:19px}
.api-js .nhom-h{display:none}
.api-js .ep-card{border:0;border-radius:0;padding:0;margin:0;background:none}
.api-js .ep-card:not(.active){display:none}
.api-js .ep-card .ep-code{display:none}
.docs.api .rail:empty{display:none}
.docs.api .rail{min-width:0}
.ep-card .tablewrap,.ep-card .codecard{max-width:100%}
/* YUIWEB-54: bảng Headers/Tham số vừa cột giữa ở desktop — giá trị mono dài (token, path) được xuống dòng trong ô */
.ep-card .dtable th{padding:9px 8px}
.ep-card .dtable td{padding:9px 8px}
.ep-card .dtable td:not(:first-child) .mono{overflow-wrap:anywhere;word-break:break-word}
.ep-card h4{margin:14px 0 6px}
.ep-card .codecard{border-radius:10px;box-shadow:none;margin:6px 0 14px}
.ep-card .cc-top{padding:8px 12px}
.dtable td.kieu{color:var(--muted)}

/* right rail / code panel */
.rail{position:sticky;top:calc(var(--h) + env(safe-area-inset-top,0px));height:calc(100vh - var(--h));overflow:auto;
  border-left:1px solid var(--border);padding:26px 22px 60px;display:flex;flex-direction:column;gap:18px}
.rail .codecard{box-shadow:var(--shadow-md)}
.rail .cc-tabs{margin-left:0;flex-wrap:wrap;min-width:0}
.rail .cc-tabs button{padding:4px 8px}
.rail-label{font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--faint)}
.try{display:flex;gap:8px}
.try .btn{flex:1;justify-content:center}
.status-row{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.status-ok{color:var(--m-get);font-weight:700;font-family:var(--font-mono)}

/* toc for overview */
.toc{position:sticky;top:calc(var(--h) + env(safe-area-inset-top,0px));padding:26px 22px;height:calc(100vh - var(--h));overflow:auto;border-left:1px solid var(--border)}
.toc .rail-label{margin-bottom:12px}
.toc a{display:block;color:var(--muted);font-size:13px;padding:5px 0 5px 12px;border-left:2px solid var(--border)}
.toc a:hover,.toc a.active{color:var(--primary);border-left-color:var(--primary)}

/* overview with toc = 3 col too */
.docs.overview{grid-template-columns:272px minmax(0,1fr) 240px}

.view{display:none}
.view.active{display:block}

/* scrim + mobile drawer */
.scrim{position:fixed;inset:0;background:rgba(5,10,20,.5);z-index:55;display:none}
.scrim.show{display:block}

@media (max-width:1100px){
  .search{min-width:0}
  .search .search-txt,.search kbd{display:none}
  .docs.api{grid-template-columns:260px minmax(0,1fr)}
  /* code panel xuống dưới nội dung thay vì ẩn (vẫn xem được ví dụ code trên tablet/mobile) */
  .docs.api .sidenav{grid-row:1 / span 2}
  .docs.api .rail{position:static;height:auto;overflow:visible;grid-column:2;border-left:0;border-top:1px solid var(--border);padding:24px 40px 60px}
  .docs.overview{grid-template-columns:260px minmax(0,1fr)}
  .docs.overview .toc{display:none}
  .hero .wrap{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:40px}
  .features{grid-template-columns:repeat(2,1fr)}
  .pgrid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav,.search,.hide-sm{display:none}
  .iconbtn.show-sm{display:grid}
  .prod-head h1{font-size:27px}
  .prod-head .picon{width:52px;height:52px}
  .menu-toggle{display:grid}
  .appbar-inner{gap:12px}
  .pgrid,.steps{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .appbar-inner{gap:10px;padding:0 14px}
  .brand{font-size:15px}
  .brand small{display:none}
  /* drawer nằm dưới header (z 56 < appbar 60) để nút ☰/theme vẫn bấm được khi drawer mở */
  .sidenav{position:fixed;left:0;top:calc(var(--h) + env(safe-area-inset-top,0px));height:calc(100% - var(--h) - env(safe-area-inset-top,0px));
    width:290px;max-width:86vw;z-index:56;background:var(--surface);transform:translateX(-102%);visibility:hidden;
    transition:transform .22s ease,visibility 0s linear .22s;border-right:1px solid var(--border);padding-top:16px;overflow:auto}
  .sidenav.open{transform:none;visibility:visible;transition:transform .22s ease}
  #scrim{top:calc(var(--h) + env(safe-area-inset-top,0px))}
  body.drawer-open{overflow:hidden}
  .sn-mainnav{display:flex;flex-direction:column;gap:2px;padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--border)}
  .sidenav-main{display:block}
  .docs,.docs.api,.docs.overview{grid-template-columns:minmax(0,1fr)}
  .docs.api .rail{grid-column:1;padding:22px 20px 50px}
  .article{padding:26px 20px 70px}
  .mobile-docnav{display:flex}
}
@media (max-width:560px){
  .hero h1{font-size:32px}
  .hero p.lead{font-size:16px}
  .pgrid,.steps,.features,.qgrid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .sec-head h2{font-size:24px}
  .ctaband{padding:30px}
  .article h1{font-size:27px}
}
.mobile-docnav{display:none;align-items:center;gap:10px;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--surface-2);position:sticky;top:calc(var(--h) + env(safe-area-inset-top,0px));z-index:40}
.mobile-docnav button{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:13.5px;background:var(--surface);border:1px solid var(--border);border-radius:9px;padding:8px 12px;color:var(--fg)}
/* ---------- modal ---------- */
.modal-backdrop{position:fixed;inset:0;background:rgba(5,10,20,.55);backdrop-filter:blur(4px);z-index:80;
  display:none;align-items:center;justify-content:center;padding:20px}
.modal-backdrop.show{display:flex;animation:fade .15s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);
  width:100%;max-width:540px;max-height:calc(100dvh - 40px);overflow:auto;animation:pop .18s ease}
@keyframes pop{from{transform:translateY(10px) scale(.98);opacity:.6}to{transform:none;opacity:1}}
.modal-head{display:flex;align-items:flex-start;gap:13px;padding:22px 22px 4px}
.mh-icon{width:42px;height:42px;border-radius:11px;flex:0 0 auto;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--accent))}
.modal-head h3{font-size:19px}
.modal-head .sub{color:var(--muted);font-size:13px;margin-top:5px;line-height:1.5}
.modal-close{margin-left:auto;flex:0 0 auto}
.modal form{padding:16px 22px 22px;display:grid;gap:13px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-size:12.5px;font-weight:600;color:var(--fg-soft)}
.field label .req{color:var(--m-del);margin-left:3px}
.field input,.field select,.field textarea{font-family:inherit;font-size:14px;padding:10px 12px;border:1px solid var(--border);
  border-radius:9px;background:var(--surface-2);color:var(--fg);width:100%;transition:border-color .12s,box-shadow .12s}
.field textarea{resize:vertical;min-height:70px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px var(--ring)}
.field input::placeholder,.field textarea::placeholder{color:var(--faint)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:6px}
.modal-note{font-size:11.5px;color:var(--faint);display:flex;align-items:center;gap:6px;margin-top:2px}
.modal-success{padding:34px 26px;text-align:center}
.modal-success .ok{width:56px;height:56px;border-radius:50%;background:var(--m-get-bg);color:var(--m-get);display:grid;place-items:center;margin:0 auto 16px}
.modal-success p{color:var(--muted);margin:8px auto 20px;max-width:34ch}
@media (max-width:480px){.row2{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}.modal-backdrop.show,.modal{animation:none!important}}

/* ---------- AI Chatbot ---------- */
.cbot-launch{position:fixed;right:22px;bottom:22px;z-index:70;width:58px;height:58px;border-radius:50%;border:0;cursor:pointer;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:var(--shadow-lg);display:grid;place-items:center;
  transition:transform .15s ease,box-shadow .15s ease}
.cbot-launch:hover{transform:translateY(-2px) scale(1.04)}
.cbot-launch .i{width:26px;height:26px;stroke-width:2}
.cbot-launch .ic-close{display:none}
.cbot-launch.open .ic-chat{display:none}
.cbot-launch.open .ic-close{display:block}
.cbot-dot{position:absolute;top:2px;right:2px;width:14px;height:14px;border-radius:50%;background:var(--m-del);border:2px solid var(--surface);
  font-size:9px;color:#fff;display:grid;place-items:center;font-weight:800;font-family:var(--font-body)}
.cbot-launch.open .cbot-dot{display:none}
@keyframes cbotping{0%{box-shadow:0 0 0 0 rgba(26,86,214,.45)}100%{box-shadow:0 0 0 14px rgba(26,86,214,0)}}
.cbot-launch:not(.open){animation:cbotping 2.2s ease-out infinite}

.cbot-panel{position:fixed;right:22px;bottom:92px;z-index:71;width:376px;max-width:calc(100vw - 32px);height:540px;max-height:calc(100vh - 130px);
  background:var(--surface);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;
  opacity:0;transform:translateY(16px) scale(.98);pointer-events:none;transition:opacity .18s ease,transform .18s ease;transform-origin:bottom right}
.cbot-panel.open{opacity:1;transform:none;pointer-events:auto}
.cbot-head{display:flex;align-items:center;gap:11px;padding:14px 16px;background:linear-gradient(120deg,var(--primary-700),var(--primary));color:#fff}
.cbot-ava{width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.18);display:grid;place-items:center;flex:0 0 auto}
.cbot-head b{font-family:var(--font-head);font-size:15px;display:block;line-height:1.1}
.cbot-head .st{font-size:11.5px;opacity:.9;display:flex;align-items:center;gap:6px;margin-top:2px}
.cbot-head .st i{width:7px;height:7px;border-radius:50%;background:#4ade80;display:inline-block}
.cbot-head .cbot-x{margin-left:auto;width:32px;height:32px;border-radius:9px;border:0;background:rgba(255,255,255,.14);color:#fff;display:grid;place-items:center;cursor:pointer}
.cbot-head .cbot-x:hover{background:rgba(255,255,255,.26)}
.cbot-body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;background:var(--surface-2)}
.cbot-msg{display:flex;gap:9px;max-width:86%}
.cbot-msg .b-ava{width:28px;height:28px;border-radius:8px;flex:0 0 auto;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent))}
.cbot-bubble{padding:10px 13px;border-radius:13px;font-size:13.5px;line-height:1.55;color:var(--fg)}
.cbot-msg.bot .cbot-bubble{background:var(--surface);border:1px solid var(--border);border-top-left-radius:4px}
.cbot-msg.me{align-self:flex-end;flex-direction:row-reverse}
.cbot-msg.me .cbot-bubble{background:var(--primary);color:#fff;border-top-right-radius:4px}
.cbot-bubble a.cbot-inline{color:var(--primary);font-weight:600;text-decoration:underline;cursor:pointer}
.cbot-msg.me .cbot-bubble a.cbot-inline{color:#fff}
.cbot-chips{display:flex;flex-wrap:wrap;gap:7px;padding:0 2px}
.cbot-chip{font-size:12.5px;font-weight:500;color:var(--primary);background:var(--primary-050);border:1px solid color-mix(in srgb,var(--primary) 22%,transparent);
  border-radius:999px;padding:6px 12px;cursor:pointer;transition:background .12s}
.cbot-chip:hover{background:color-mix(in srgb,var(--primary) 14%,var(--surface))}
.cbot-typing{display:flex;gap:4px;padding:11px 14px;background:var(--surface);border:1px solid var(--border);border-radius:13px;border-top-left-radius:4px;width:fit-content}
.cbot-typing span{width:7px;height:7px;border-radius:50%;background:var(--faint);animation:cbotblink 1.2s infinite ease-in-out}
.cbot-typing span:nth-child(2){animation-delay:.2s}.cbot-typing span:nth-child(3){animation-delay:.4s}
@keyframes cbotblink{0%,60%,100%{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
.cbot-foot{border-top:1px solid var(--border);background:var(--surface);padding:10px 12px;display:flex;align-items:flex-end;gap:8px}
.cbot-input{flex:1;border:1px solid var(--border);background:var(--surface-2);border-radius:11px;padding:9px 12px;font-family:inherit;font-size:13.5px;
  color:var(--fg);resize:none;max-height:90px;line-height:1.4;min-height:40px}
.cbot-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--ring)}
.cbot-send{width:40px;height:40px;border-radius:11px;border:0;background:var(--primary);color:#fff;display:grid;place-items:center;cursor:pointer;flex:0 0 auto}
.cbot-send:hover{background:var(--primary-600)}
.cbot-send:disabled{opacity:.5;cursor:default}
.cbot-note{text-align:center;font-size:10.5px;color:var(--faint);padding:0 12px 9px;background:var(--surface)}
@media (max-width:480px){
  .cbot-panel{right:12px;left:12px;bottom:84px;width:auto;height:calc(100vh - 150px)}
  .cbot-launch{right:16px;bottom:16px}
}
/* ===== Đăng ký tích hợp (modal) + toast — modal dùng .modal-backdrop/.modal/.field của mockup (YUIWEB-41) ===== */
.dk-box{max-width:580px}
.dk-label{font-size:12.5px;font-weight:600;color:var(--fg-soft);display:block;margin-bottom:2px}
.dk-chips{display:flex;flex-wrap:wrap;gap:8px}
.dk-chip{display:inline-flex;flex-direction:row;align-items:center;gap:7px;font-size:13px;font-weight:500;padding:6px 12px;
  border:1px solid var(--border);border-radius:999px;background:var(--surface-2);color:var(--fg-soft);cursor:pointer;line-height:1.3}
.dk-chip:hover{border-color:var(--border-strong)}
.dk-chip:has(input:checked){border-color:var(--primary);background:var(--primary-050);color:var(--primary)}
.dk-agree{display:flex;flex-direction:row;align-items:flex-start;gap:9px;font-size:13px;color:var(--fg-soft);cursor:pointer;line-height:1.45}
.dk-form input[type=checkbox]{width:16px;height:16px;margin:0;padding:0;border:0;background:none;box-shadow:none;flex:0 0 auto;accent-color:var(--primary);cursor:pointer}
.dk-form .dk-agree input[type=checkbox]{margin-top:2px}
.dk-err{border:1px solid color-mix(in srgb,var(--m-del) 35%,transparent);background:var(--m-del-bg);color:var(--m-del);
  border-radius:9px;padding:9px 12px;font-size:13px}
.dk-box .modal-success[hidden],.dk-box form[hidden]{display:none}
.dk-toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,120%);background:#0a7d4b;color:#fff;padding:12px 18px;border-radius:10px;box-shadow:var(--shadow-md);z-index:120;transition:transform .35s ease;max-width:90vw}
.dk-toast.on{transform:translate(-50%,0)}
.cc-copy.ok{color:#28c840}